Web domains are real estate. Its like a piece of land. Most of the hottest land in the world have been taken. The same goes to web domains.
However there are some hidden gems web domains remain unregistered like some piece of lands hidden but have very huge potential due to the strategic location.
I like a very popular quote by the richest man in the world, Bill Gates:
"Domains have and will continue to go up in value faster than any other commodity ever known to man".
If we really know what we are doing, Web Domains business is a very lucrative business whereby a 'piece of land' bought for $8 can be turned into $500 in a short period of time or even $xx,xxx in value if it is developed to become a full blown website within 1-3 years time, following the important guides.
To those who are still new in the web domains business, welcome to the domaining world. Be patient, don't be greedy. Learn from expert domainers from forums, ebooks and guides before buying lots of high priced web domains.